Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: qual é o clube na sexta rodada adequada
 ###Tabelas: CREATE TABLE starters_for_3_different_teams (starters_for_3_different_teams_id AUTO_INCREMENT PRIMARY KEY, Quarterback VARCHAR, Games INT, Teams VARCHAR, Wins INT, Losses INT, Percent INT) CREATE TABLE doubles:_37_17–20 (doubles:_37_17–20_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Surface VARCHAR, Partnering VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE bischofshofen_6_january (bischofshofen_6_january_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Name VARCHAR, Nationality VARCHAR, 1st (m) INT, 2nd (m) INT, Points INT, Overall FHT points VARCHAR, Overall WC points (Rank) VARCHAR) CREATE TABLE head_coaches_and_all-time_results (head_coaches_and_all-time_results_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Years VARCHAR, Seasons INT, Lost INT, Pct. INT) CREATE TABLE calendar (calendar_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Main date VARCHAR, Number of fixtures INT, Clubs VARCHAR, New entries this round VARCHAR, Prize money VARCHAR, Player of the Round VARCHAR)  
SELECT Clubs FROM calendar WHERE Round = Sixth round proper